Key for a drill cutting head



FIG. 1 is a perspective view of a key for a drill cutting head showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a side view thereof; and,

FIG. 5 is a bottom plan view thereof.

The broken lines shown in FIG. 5 represent unclaimed subject matter and form no part of the claimed design. 

The ornamental design for a key for a drill cutting head, as shown and described. 